Background suppression for anomaly detection
AssigneeNEC Laboratories America, Inc.
InventorsYuncong Chen, Dongjin Song, Haifeng Chen
Life of this patent
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Abstract
Systems and methods for anomaly detection are provided. The method includes structuring a multi-channel spatial-temporal sequence as a four-dimensional array. The method also includes decomposing the four-dimensional array to form a low-rank component representing a background signal and a residual component representing anomalies for each time point of the multi-channel spatial-temporal sequence. The method further includes determining a sequence of anomaly maps by stacking the residual components at all time points together. Anomalies are identified based on the sequence of anomaly maps
Claims20
A method for anomaly detection, comprising:
- structuring a multi-channel spatial-temporal sequence as a four-dimensional array;
- decomposing the four-dimensional array to form a low-rank component representing a background signal and a residual component representing anomalies for each time point of the multi-channel spatial-temporal sequence;
- determining a sequence of anomaly maps by stacking the residual components at all time points together;
- and
- identifying anomalies based on the sequence of anomaly maps.
A computer system for anomaly detection, comprising:
- a processor device operatively coupled to a memory device, the processor device being configured to:
- structure a multi-channel spatial-temporal sequence as a four-dimensional array;
- decompose the four-dimensional array to form a low-rank component representing a background signal and a residual component representing anomalies for each time point of the multi-channel spatial-temporal sequence;
- determine a sequence of anomaly maps by stacking the residual components at all time points together;
- and
- identify anomalies based on the sequence of anomaly maps.
A computer program product for anomaly detection, the computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computing device to cause the computing device to perform the method comprising:
- generating sentences of discrete event sequences for a plurality of sensors;
- building a sensor relationship network using the sentences of discrete event sequences;
- analyzing the sensor relationship network to determine relationships between the plurality of sensors;
- performing fault diagnosis based on the sensor relationship network and the relationships between the plurality of sensors;
- and
- performing a remedial action to address the fault diagnosis.
Dependencies are inferred from the claim text.